Oven door



Sept. 13, 1928. 1,684,808

W. F. ROGERS OVEN DOOR Filed July 6, 1927 2 $heetsSheet 1 [7204972 $2Mai 7265565: caizv Ffiyers,

w gavu Z3 W. F. ROGERS OVEN DOOR Filed July 6, 1927 2 Sheets-Sheet 2Patented Sept. 18, 1928.

WALTER 1'. ROGERS, OF CHICAGO, ILLINOIS.

OVEN

Application filed July 8,

This invention relates to oven door construction and its main objectsare to provide 2 an improved type of oven door; to provide an oven doorwhich may be readily assembled, or dismantled for repair purposes; andto provide an oven door and door frame having improved means fortensioning the opening and closing movement of the oven door.

An illustrative embodiment of the invention is shown in the accompanyingdrawings, wherein Fi.1isafront and its frame.

Fig. 2 is an enlarged sectional view thereof taken on line 22 of Fig. 1,the door, in its opened position, being shown in dotted lines.

Fig. 3 is an enlarged fragmentary rear view of a lower corner of thedoor and its frame.

Fig. 4 is an enlarged perspective fragmentary rear view of t e oppositelower corner of the door and its frame.

Fig. 5 is an enlarged view of the oven door, partly in section, shownmounted on its frame, its opened position being shown 1n dotted lines.

Heretofore, in oven construction, 1t has been the practice toincorporate thereln a tension spring which acts between the door anddoor-frame in such manner as to assist in lifting or closing the doorwhen moved from its open or horizontal position to its closed orvertical position. A coiled tension spring has commonly been employedfor this purpose and was located usually 1n the channel-shapeddoor-frame.

Due to repeated heating and cooling of this spring, it has been foundthat it often becomes crystallized and breaks and when this happens ithas been necessary to remove the entire door-frame from the oven inorder to replace the broken spring.

In the present construction, shown in this invention, the coiled tensionsprin is located in the channel shaped margina frame of the door itselfand when a spring breaks and needs to be replaced, .it is only necessaryto remove the sheet metal lining of the door in order to make thenecessary replacement, thereby avoiding the dismantling of thedoor-frame.

In the construction shown In the drawings an oven door-frame 1 ofchannel construction and of rectangular form is secured elevation of theoven door noon.

1927. Serial llo. 201,835.

and set into a sheet metal oven compartment An oven door 3 is providedwith a handle 4 and is hingedly mounted on the frame 1 by means of apair of trunnions 5 and 6 which project laterally and are supported inrecesses 7. A sheet metal lining 3.1 is mounted on the inside of thedoor 3.

The trunnion 5 is detachably secured to the oven door by means of thescrews 8 in order to provide ready dismantlin and assembl of the doorand its frame. he other trunnion 6 is integrally cast with the oven doorand each trunnion is provided with an outwardly projecting integrallycast lug 9 which contacts with laterally pro'ecting stops 10, castintegrally with the c annel door-frame, when the door is in its fullyopened or horizontal position.

Spring tensioned means tending to resist the opening of said doorcomprises a helical spring 11 secured at one of its ends to the insideof the door so as to be covered by the door lining (not shown) by meansof the screw 12 and at its other end to a link 13 slidable within abearing block 14 and in the direction of the spring tension. The link 13is pivotall connected at 15 to an arcuate link 15 w ich is pivotallsecured at its other end to the door-frame y means of the screw 16.Means for limiting the movement of the arcuate link comprises the headedstud 17 set into the door-frame. The arcuate link 15 contacts with theheaded stud 17 before the door is in its fully opened osition and thetension of the spring is there y increased durin the rest of the openingmovement of the cor. Movement 0 the door in this direction is limited bythe contacting of the lugs 9 with their respective stops 10. As shown inFig. 5 of the drawings, when the door 3 is opened to a horizontalposition, the point of pivotal connection 15* passes through the arc ofa circle, whose center is the pivot 16, whereas, if the point 15 were tobe swung through an arc of a circle whose center is the pivot 6 of thedoor, the two arcs would diverge as shown in dotted outline. The amountof such divergence is the amount the tension spring 11 is stretchedbefore the link 15 contacts with the stud 17.

It will, therefore, be seen that the construction herein shown anddescribed provides an oven door which may be readily assembled ordismantled for repair purposes such as the replacement of the springtensioned means in the event that the spring breaks or becomesineffective for any reason, and that im roved means are 1provided fortensioning t e opening and cosing movement of the oven door.

While but one specific embodiment of this invention has been hereinshown and described, it will be understood that numerous details of theconstruction shown may be altered or omitted without departin from thespirit of this invention as de%ned by the following claims.

I claim:

1. In an oven door and frame therefor, means to provide for the openinand closing ing movement of said door an sprin tensioned means resistingthe opening 0 said door comprising a spring secured at one of its endsto the door and at its other end to an arcuate link, said link beingconnected to said door-frame.

2. In an oven door and frame therefor, means to provide for th openingand closing movement of said door and spring tensioned means resistingthe opening of said door comprising a spring secured at one of its endsto the door and at its other end to an arcuate link, said link beingconnected to said door frame, and means for limiting the movement of thearcuate link to increase the tension on said spring.

3. In an oven door and frame therefor, means to provide for the openingand closing movement of said door and spring tensioned means resistingthe opening of said door comprising a spring secured at one of its endsto the door and at its other end to a link slidable within a bearing andin the direction of the spring tension, said link being pivotallyconnected to an arcuate link connected to said door-frame.

4. The combination of an oven doorframe, a door swingabl mounted on saidframe, and a coiled tension spring mounted on the inside of said door soas to be covered by the door lining and having one end connected to saidframe for aiding the closing of said door.

Signed at Chicago this 24th day of June,

WALTER F. ROGERS.

